Cutting mechanism.



E. W. COOPER. CUTTING MECHANISM. APPLICATION FILED MAR.15, 1909.

Patented Sept. 27, 1910.

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E. W. COOPER. CUTTING MECHANISM. APPLICATION FILED MAR. 15, 1909.

Patented Sept. 27, 1910.

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E. W. COOPER.

CUTTING MECHANISM. APPLICATION FILED MAR. 15, 1909.

Patented Sept. 27, 1910.

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shearing cut may be efi'ected.

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ELLIS COOPER, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS,

HOE AND (30., OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

- CUTTING- MECHANISM.

Specification of Letters Patent. Patgnted Sept, 2*? 1991 Application filed March 15, 1909. Serial No. 483,363.

To all whom it may concern:

Be it known that I, ELLIS W. Coornn, a citizen of the United States, residing at New York, county of New York, and State of New York, have invented certain new and useful Improvements in Cutting Mechanisms, fully described and represented in the following specification and the accompanying drawings, forming a part ofthe same.

This invention relates to improvements in cutting mechanism for cutting sheet material and more particularly to that class of cutting mechanisms in which oneor both of the cutting members are mounted so as to move in a curved path.

In the constructions ordinarily employed for cutting sheet material, such, for instance, as'paper, in which the-cutting member is mounted on a rotary carrier, the cutter is so disposed with relation to the carrier that the cut must take place in a comparatively short period of time in the rotation of the carrier. For instance, if, as is common in a certain class of constructions, the knife is mounted on a rotary carrier, this knife cooperating with a cutting member on a second rotary carrier, the cut must take place substantially in that period of time during which the paths of the carriers are substantially tan cut to or most nearly approach each other. This requires a'rapid operation of the cutter, and it is, therefore, usual in constructions of the character referred to to so mount the cutting blade that all parts of it come into operation substantially simultaneously. In this class of cutting devices, therefore, the advantages incident to what is known as a shearing cut are not obtained.

It is one of the objects of this invention to produce an improved cutting mechanism in which the cutting members, or one of them, shall move in a curved path and in which the-time during which the cutting may take place shall be increased.

A further object-of the invention is to produce an improved cutting mechanism in' which the cutting members, or one of them, shall move in a. curved path and by which a With these and other obgects not specifi cally referred to in view, the invention con-- sists in certain constructions and in certain parts, improvements and combinations as will be hereinafter fully described and then specifically pointed out.

Referring to the accompanying draw- 1ngsFigure 1 is a plan view of a cutting mechanism embodying the invention. Fig. 2 is a section, on the line 2-2, of Fig.- 1. Fig. 3 is a plan view of a modified form of construction embodying the invention. Fig. 4 is a section on the line 44 of Fig. 3. Figs. 5 and 6 are diagrammatic views illustrating another modified form of construction in which the invention may be embodied, certain parts being shown in different positions in the two figures. Figs. 7, 8 and 9 are diagrammatic views illustrating the operation of the cutting members shown in Figs. 1 to 4 inclusive.

In the mechanisms which have been selected to illustrate concrete embodiments of the invention, the cutting members are mounted on rotary carriers.

Referringmore particularly to the construction illustrated in Figs. 1 and 2, the carrier for the knife comprises a shaft 1 provided with heads, only one head, 2, however being shown. The shaft is supported in suitable bearings, one of which is indicated at 3. In the particular construction illustrated in these figures, the rotary carrier supports a knife holder. The details of construction of this holder, when employed, may be varied, but in the particular construction illustrated in Figs. 1 and 2, it consists of a bar 4, the ends of which are formed to provide journals which are mounted in suitable bearings in the heads 2 of the carrier.

The cutter employed may be of any suit-' tion, successive positions which are parallel to each other. The means for giving the holder the movement referred to, so as to cause the knife to assume the successive parallel positions during thecutting opera-' tion, may be varied widely, and several mechanisms are shown for that purpose.

Referring more particularly to Figs. 1 and 2, the ends of the journals on the bar 4; are provided with crank arms 7 carrying crank pins 8. These crank pins engage re- I movement. lVhile only one end of the carrier and the knife operating mechanism .is shown, it will be understood that the other end of the carrier may be provided with similar knife operating mechanism.

In the-constructions illustrated, the cooperating member is mounted on a rotary carrier consisting of a cylinder 21 mounted on a shaft 22 supported in suitable bearings, as 23.

In the best constructions embodying the invention, the cooperating member will be formed with a cutting edge with which the knife coacts in making the cut. This cut ting edge, when employed, may be formed 'lIl various ways, but may be conveniently formed by cutting away a surface to leave a sharp edge or corner.

In the construction shownin Figs. '1 and 2, the carrier 21 has mounted thereon a bar 23 located in a recess 24 in the carrier. The surface of this bar is cut away to form a shoulder, the edge 25 of whichconstitutes a cutting edge.

in the best constructions embodying the invention, and where, as will usually-be the case, a shearing cut is desired, the knife will be arranged so that a part of it shall come into operation before another part. In the construction shown in Figs. 1 and 2, the knife is so constructed that one end of its edge projects farther from its carrier than the other end, this construction being clearly indicated in Fig. 1, in which the projecting end of the edge referred to is marked 26. It is obvious that this construction will provide for a shearing out along the length of the cutting edge, as successive parts of the knife and edge will come into cooperative cut-ting relation as the carriers rotate. It isfurther apparent that the cut will begin at apoint some distance in the paths of the carriers from the point where these paths most closely approach each other, so that the time necessary for the shearing cut to take place is afforded.

The construction illustrated in Figs. 3 and at is, in many respects, similar to that illustrated in Figs. 1 and 2, the knife carrying shaft 1, the heads 2, knife holder 4 and the blade 5 being similar in construction to the construction illustrated in those figures. In the construction illustrated in Figs. 3 and 4:, however, the journal of the holder 4 is provided with a gear 2? meshing with a broadfaced intermediate 28 mounted on a stud'29 supported in the carrier head 2. This broad-faced intermediate meshes with a gear 30 fast on a collar 31 provided with an arm 32 through which arm is passed a bolt 33 entering an opening in the frame. The

opening in the arm through which the bolt passes may be a slot, as indicated at 34,, thus providing for slight adjustment of the knife through the gearing referred to. As.

ting edge is employed, this member being mounted on a rotary carrier 21 supported on a shaft 22. In the construction shown in these figures, however, the carrier has a flat shearing cut, and the cooperating cutting edge is carried on a rotary carrier, clearance should be provided for that part of the knife which has passed the cutting edge. In the particular construction shown this is efiected by providing the wall 37 of the bar 36 behind the cutting edge 25 with a spiral surface (see Figs. 7 to 9).

The construction referred to will be understood by referring to the diagrams, Figs. 7, 8 and 9, in which the spiral surface is illustrated and marked 37. This spiral surface is formed around the cutting edge 25 as a center. In these diagrams, Fig. 7 illustrates the position of the knife 5 and. the bar 36 at the time the end of the knife edge 26 has just passed the cutting edge, Figs. 8 and 9 illustrating successive positions of the knife and bar.

Figs. 3 and 4: show intermeshing gears 38, 39 which may be employed to drive the shafts 1 and 22, as is common in rotary cutting mechanism.

Figs. 5 and 6 illustrate diagrammatically, in part, another form of mechanism in which the invention may be embodied. The shafts 1 and 22 are the same as in the construction before described and the holder bar at in the in the construction shown in Figs. 1 and 2, a cooperating cutting member having a cutcarrier 2 is operated by means of gearing 27, 28 and 30, as in the construction illus trated in Figs. 3 and 4:, this gearingbeing, however, diagrammatically indicated. The carrier 21, however, is provided with a holder bar 40 mounted in the same manner as the holder bar 4, thisbar being provided with a knife ll. The holder 4 .0 and knife 41 are, by means of the gears, diagrammatically indicated at- 4.2, 43, etet, caused to assume successive parallel positions, the construction being the same as that described in connection with the knife illustrated in Figs. 3 and 4. The knives 5 and 41 illustrated in these figures are arranged to produce a shearing cut, Fig. 5 representing the 'position of the parts about the time the cutting operation begins, which, it. will be seen, as has been pointed out, is considerably in advance of the points at which the paths of the carriers most nearly approach each other. Fig. 6 illustrates the relative position of the parts at the time the cut is nearly completed.

While several constructions have been illustrated in which the invention may be embodied, it will be understood that the invention may be embodied in other constructions diflering from these. It will be further understood that cutting mechanisms may be constructed which embody certain features independently of other features. The invention is not, therefore, to-be limited 'to the specific constructions hereinbefore described and illustrated.

What isclaimed is 1. The combination with a carrier, of a cutter mounted thereon, said carrier bein constructed to move the cutter in a curved path duringthe cutting operation, means for causing the cutter during the cutting operation to assume successive positions which are parallel to each other, and a cooperating cutting member.

2. The combination with a rotary carrier, of a cutter mounted thereon, means for causing the cutter during the cutting operation to assume successive positions which are parallel to each other, and a cooperating cutting member.

3. The combination with a rotary carrier, of a cutter mounted thereon, the edge of the cutter being so disposed that 'a part thereof comes into operation before another part, whereby a shearing cut is effected,

means for causing the cutter during the cutting operation to assume successive positions whlch are parallel to each other, and a cooperating cutting member.

4. The combination with a rotary car-- rier, of a cutter mounted thereon, means for causing the cutter during the cuttlng operation to assume successive positions which are parallel to each other, and a second rotary carrier having a cooperating cutting surface.

5. The combination with a rotary carrier. of a cutter mounted thereon, means for causing the cutter during the cutting operation to assume successive positions which are parallel to each other, and a second rotary carrier having a cooperating cutting edge.

6. The combination with a carrier having a surface 'cut away to form a cutting edge, the wall behind the edge being formed on a spiral and the carrier being arranged to cause the edge to move in a curved path during the cutting operation, of a second car rier, a cutter mounted thereon, .said second carrier being arranged to cause the cutter to move in a curved path during the cutting operation, and means for causing the cutter during the cutting operation to assume successive positions which are parallel to each other, the edge of the cutter being arranged at an angle to the cooperating cutting edge whereby a shearing cut is formed.

7. The combination with a rotary carrier having a surface cut away to form a cutting edge, the wall behind the edge being formed on a spiral, of asecond rotary carrier, a cutter mounted thereon, and means for causing the cutter during the cutting operation to assume successive positions which are parallel to each other,'the edge of the cutter being arranged at an angle to the cooperating cutting edge whereby a shearing cut is formed.

8. The combination with a rotary carrier, of a cutter holder journaled therein, a cutter blade mounted on-the holder, means for rotating the holder during the cutting operation to cause the blade to assume successive positions during the cutting operation which are parallel to each other, and a second rotary carrier having a cooperating cutting surface. I

9. The combination with a rotary carrier, of a cutter holder ournaled therein, an

eccentric, a cutter mounted on the holder,

the cutter being constructed so that a part of its edge comes into operation before another part, and a second carrier having a surface cut away to provide a cutting edge, the wall behind the cutting edge being formed on a spiral.

In testimony whereof, I have hereunto set may hand, in the presence of two subscribing witnesses.

ELLIS VJ. COOPER.

Witnesses F. W. H. CRANE, Geo. V. WILLIAMSON. 

